![Heiko Carstens](/assets/img/avatar_default.png)
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
1400 lines
34 KiB
C
1400 lines
34 KiB
C
/*
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* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
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* Horst Hummel <Horst.Hummel@de.ibm.com>
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* Carsten Otte <Cotte@de.ibm.com>
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Bugreports.to..: <Linux390@de.ibm.com>
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* Copyright IBM Corp. 1999,2001
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*
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* Device mapping and dasd= parameter parsing functions. All devmap
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* functions may not be called from interrupt context. In particular
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* dasd_get_device is a no-no from interrupt context.
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*
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*/
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#define KMSG_COMPONENT "dasd"
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#include <linux/ctype.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <asm/debug.h>
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#include <asm/uaccess.h>
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#include <asm/ipl.h>
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/* This is ugly... */
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#define PRINTK_HEADER "dasd_devmap:"
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#define DASD_BUS_ID_SIZE 20
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#include "dasd_int.h"
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struct kmem_cache *dasd_page_cache;
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EXPORT_SYMBOL_GPL(dasd_page_cache);
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/*
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* dasd_devmap_t is used to store the features and the relation
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* between device number and device index. To find a dasd_devmap_t
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* that corresponds to a device number of a device index each
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* dasd_devmap_t is added to two linked lists, one to search by
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* the device number and one to search by the device index. As
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* soon as big minor numbers are available the device index list
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* can be removed since the device number will then be identical
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* to the device index.
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*/
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struct dasd_devmap {
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struct list_head list;
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char bus_id[DASD_BUS_ID_SIZE];
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unsigned int devindex;
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unsigned short features;
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struct dasd_device *device;
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};
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/*
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* Parameter parsing functions for dasd= parameter. The syntax is:
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* <devno> : (0x)?[0-9a-fA-F]+
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* <busid> : [0-0a-f]\.[0-9a-f]\.(0x)?[0-9a-fA-F]+
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* <feature> : ro
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* <feature_list> : \(<feature>(:<feature>)*\)
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* <devno-range> : <devno>(-<devno>)?<feature_list>?
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* <busid-range> : <busid>(-<busid>)?<feature_list>?
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* <devices> : <devno-range>|<busid-range>
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* <dasd_module> : dasd_diag_mod|dasd_eckd_mod|dasd_fba_mod
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*
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* <dasd> : autodetect|probeonly|<devices>(,<devices>)*
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*/
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int dasd_probeonly = 0; /* is true, when probeonly mode is active */
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int dasd_autodetect = 0; /* is true, when autodetection is active */
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int dasd_nopav = 0; /* is true, when PAV is disabled */
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EXPORT_SYMBOL_GPL(dasd_nopav);
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int dasd_nofcx; /* disable High Performance Ficon */
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EXPORT_SYMBOL_GPL(dasd_nofcx);
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/*
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* char *dasd[] is intended to hold the ranges supplied by the dasd= statement
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* it is named 'dasd' to directly be filled by insmod with the comma separated
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* strings when running as a module.
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*/
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static char *dasd[256];
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module_param_array(dasd, charp, NULL, 0);
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/*
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* Single spinlock to protect devmap and servermap structures and lists.
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*/
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static DEFINE_SPINLOCK(dasd_devmap_lock);
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/*
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* Hash lists for devmap structures.
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*/
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static struct list_head dasd_hashlists[256];
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int dasd_max_devindex;
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static struct dasd_devmap *dasd_add_busid(const char *, int);
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static inline int
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dasd_hash_busid(const char *bus_id)
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{
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int hash, i;
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hash = 0;
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for (i = 0; (i < DASD_BUS_ID_SIZE) && *bus_id; i++, bus_id++)
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hash += *bus_id;
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return hash & 0xff;
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}
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#ifndef MODULE
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/*
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* The parameter parsing functions for builtin-drivers are called
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* before kmalloc works. Store the pointers to the parameters strings
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* into dasd[] for later processing.
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*/
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static int __init
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dasd_call_setup(char *str)
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{
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static int count = 0;
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if (count < 256)
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dasd[count++] = str;
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return 1;
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}
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__setup ("dasd=", dasd_call_setup);
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#endif /* #ifndef MODULE */
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#define DASD_IPLDEV "ipldev"
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/*
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* Read a device busid/devno from a string.
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*/
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static int
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dasd_busid(char **str, int *id0, int *id1, int *devno)
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{
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int val, old_style;
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/* Interpret ipldev busid */
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if (strncmp(DASD_IPLDEV, *str, strlen(DASD_IPLDEV)) == 0) {
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if (ipl_info.type != IPL_TYPE_CCW) {
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pr_err("The IPL device is not a CCW device\n");
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return -EINVAL;
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}
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*id0 = 0;
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*id1 = ipl_info.data.ccw.dev_id.ssid;
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*devno = ipl_info.data.ccw.dev_id.devno;
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*str += strlen(DASD_IPLDEV);
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return 0;
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}
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/* check for leading '0x' */
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old_style = 0;
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if ((*str)[0] == '0' && (*str)[1] == 'x') {
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*str += 2;
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old_style = 1;
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}
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if (!isxdigit((*str)[0])) /* We require at least one hex digit */
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return -EINVAL;
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val = simple_strtoul(*str, str, 16);
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if (old_style || (*str)[0] != '.') {
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*id0 = *id1 = 0;
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if (val < 0 || val > 0xffff)
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return -EINVAL;
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*devno = val;
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return 0;
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}
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/* New style x.y.z busid */
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if (val < 0 || val > 0xff)
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return -EINVAL;
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*id0 = val;
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(*str)++;
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if (!isxdigit((*str)[0])) /* We require at least one hex digit */
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return -EINVAL;
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val = simple_strtoul(*str, str, 16);
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if (val < 0 || val > 0xff || (*str)++[0] != '.')
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return -EINVAL;
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*id1 = val;
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if (!isxdigit((*str)[0])) /* We require at least one hex digit */
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return -EINVAL;
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val = simple_strtoul(*str, str, 16);
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if (val < 0 || val > 0xffff)
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return -EINVAL;
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*devno = val;
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return 0;
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}
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/*
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* Read colon separated list of dasd features. Currently there is
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* only one: "ro" for read-only devices. The default feature set
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* is empty (value 0).
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*/
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static int
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dasd_feature_list(char *str, char **endp)
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{
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int features, len, rc;
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rc = 0;
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if (*str != '(') {
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*endp = str;
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return DASD_FEATURE_DEFAULT;
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}
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str++;
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features = 0;
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while (1) {
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for (len = 0;
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str[len] && str[len] != ':' && str[len] != ')'; len++);
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if (len == 2 && !strncmp(str, "ro", 2))
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features |= DASD_FEATURE_READONLY;
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else if (len == 4 && !strncmp(str, "diag", 4))
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features |= DASD_FEATURE_USEDIAG;
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else if (len == 3 && !strncmp(str, "raw", 3))
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features |= DASD_FEATURE_USERAW;
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else if (len == 6 && !strncmp(str, "erplog", 6))
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features |= DASD_FEATURE_ERPLOG;
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else if (len == 8 && !strncmp(str, "failfast", 8))
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features |= DASD_FEATURE_FAILFAST;
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else {
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pr_warning("%*s is not a supported device option\n",
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len, str);
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rc = -EINVAL;
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}
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str += len;
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if (*str != ':')
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break;
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str++;
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}
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if (*str != ')') {
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pr_warning("A closing parenthesis ')' is missing in the "
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"dasd= parameter\n");
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rc = -EINVAL;
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} else
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str++;
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*endp = str;
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if (rc != 0)
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return rc;
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return features;
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}
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/*
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* Try to match the first element on the comma separated parse string
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* with one of the known keywords. If a keyword is found, take the approprate
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* action and return a pointer to the residual string. If the first element
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* could not be matched to any keyword then return an error code.
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*/
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static char *
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dasd_parse_keyword( char *parsestring ) {
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char *nextcomma, *residual_str;
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int length;
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nextcomma = strchr(parsestring,',');
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if (nextcomma) {
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length = nextcomma - parsestring;
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residual_str = nextcomma + 1;
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} else {
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length = strlen(parsestring);
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residual_str = parsestring + length;
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}
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if (strncmp("autodetect", parsestring, length) == 0) {
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dasd_autodetect = 1;
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pr_info("The autodetection mode has been activated\n");
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return residual_str;
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}
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if (strncmp("probeonly", parsestring, length) == 0) {
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dasd_probeonly = 1;
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pr_info("The probeonly mode has been activated\n");
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return residual_str;
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}
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if (strncmp("nopav", parsestring, length) == 0) {
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if (MACHINE_IS_VM)
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pr_info("'nopav' is not supported on z/VM\n");
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else {
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dasd_nopav = 1;
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pr_info("PAV support has be deactivated\n");
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}
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return residual_str;
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}
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if (strncmp("nofcx", parsestring, length) == 0) {
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dasd_nofcx = 1;
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pr_info("High Performance FICON support has been "
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"deactivated\n");
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return residual_str;
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}
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if (strncmp("fixedbuffers", parsestring, length) == 0) {
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if (dasd_page_cache)
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return residual_str;
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dasd_page_cache =
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kmem_cache_create("dasd_page_cache", PAGE_SIZE,
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PAGE_SIZE, SLAB_CACHE_DMA,
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NULL);
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if (!dasd_page_cache)
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DBF_EVENT(DBF_WARNING, "%s", "Failed to create slab, "
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"fixed buffer mode disabled.");
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else
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DBF_EVENT(DBF_INFO, "%s",
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"turning on fixed buffer mode");
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return residual_str;
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}
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return ERR_PTR(-EINVAL);
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}
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/*
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* Try to interprete the first element on the comma separated parse string
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* as a device number or a range of devices. If the interpretation is
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* successful, create the matching dasd_devmap entries and return a pointer
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* to the residual string.
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* If interpretation fails or in case of an error, return an error code.
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*/
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static char *
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dasd_parse_range( char *parsestring ) {
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struct dasd_devmap *devmap;
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int from, from_id0, from_id1;
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int to, to_id0, to_id1;
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int features, rc;
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char bus_id[DASD_BUS_ID_SIZE+1], *str;
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str = parsestring;
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rc = dasd_busid(&str, &from_id0, &from_id1, &from);
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if (rc == 0) {
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to = from;
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to_id0 = from_id0;
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to_id1 = from_id1;
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if (*str == '-') {
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str++;
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rc = dasd_busid(&str, &to_id0, &to_id1, &to);
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}
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}
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if (rc == 0 &&
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(from_id0 != to_id0 || from_id1 != to_id1 || from > to))
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rc = -EINVAL;
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if (rc) {
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pr_err("%s is not a valid device range\n", parsestring);
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return ERR_PTR(rc);
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}
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features = dasd_feature_list(str, &str);
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if (features < 0)
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return ERR_PTR(-EINVAL);
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/* each device in dasd= parameter should be set initially online */
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features |= DASD_FEATURE_INITIAL_ONLINE;
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while (from <= to) {
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sprintf(bus_id, "%01x.%01x.%04x",
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from_id0, from_id1, from++);
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devmap = dasd_add_busid(bus_id, features);
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if (IS_ERR(devmap))
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return (char *)devmap;
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}
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if (*str == ',')
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return str + 1;
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if (*str == '\0')
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return str;
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pr_warning("The dasd= parameter value %s has an invalid ending\n",
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str);
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return ERR_PTR(-EINVAL);
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}
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static char *
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dasd_parse_next_element( char *parsestring ) {
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char * residual_str;
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residual_str = dasd_parse_keyword(parsestring);
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if (!IS_ERR(residual_str))
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return residual_str;
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residual_str = dasd_parse_range(parsestring);
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return residual_str;
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}
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/*
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* Parse parameters stored in dasd[]
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* The 'dasd=...' parameter allows to specify a comma separated list of
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* keywords and device ranges. When the dasd driver is build into the kernel,
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* the complete list will be stored as one element of the dasd[] array.
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* When the dasd driver is build as a module, then the list is broken into
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* it's elements and each dasd[] entry contains one element.
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*/
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int
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dasd_parse(void)
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{
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int rc, i;
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char *parsestring;
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rc = 0;
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for (i = 0; i < 256; i++) {
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if (dasd[i] == NULL)
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break;
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parsestring = dasd[i];
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/* loop over the comma separated list in the parsestring */
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while (*parsestring) {
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parsestring = dasd_parse_next_element(parsestring);
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if(IS_ERR(parsestring)) {
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rc = PTR_ERR(parsestring);
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break;
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}
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}
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if (rc) {
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DBF_EVENT(DBF_ALERT, "%s", "invalid range found");
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break;
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}
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}
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return rc;
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}
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/*
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* Add a devmap for the device specified by busid. It is possible that
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* the devmap already exists (dasd= parameter). The order of the devices
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* added through this function will define the kdevs for the individual
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* devices.
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*/
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static struct dasd_devmap *
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dasd_add_busid(const char *bus_id, int features)
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{
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struct dasd_devmap *devmap, *new, *tmp;
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int hash;
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new = (struct dasd_devmap *)
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kzalloc(sizeof(struct dasd_devmap), GFP_KERNEL);
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if (!new)
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return ERR_PTR(-ENOMEM);
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spin_lock(&dasd_devmap_lock);
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devmap = NULL;
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hash = dasd_hash_busid(bus_id);
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list_for_each_entry(tmp, &dasd_hashlists[hash], list)
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if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) {
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devmap = tmp;
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break;
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}
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if (!devmap) {
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/* This bus_id is new. */
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new->devindex = dasd_max_devindex++;
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strncpy(new->bus_id, bus_id, DASD_BUS_ID_SIZE);
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new->features = features;
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new->device = NULL;
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list_add(&new->list, &dasd_hashlists[hash]);
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devmap = new;
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new = NULL;
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}
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spin_unlock(&dasd_devmap_lock);
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kfree(new);
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return devmap;
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}
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/*
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* Find devmap for device with given bus_id.
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*/
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static struct dasd_devmap *
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dasd_find_busid(const char *bus_id)
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{
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struct dasd_devmap *devmap, *tmp;
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int hash;
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spin_lock(&dasd_devmap_lock);
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devmap = ERR_PTR(-ENODEV);
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hash = dasd_hash_busid(bus_id);
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list_for_each_entry(tmp, &dasd_hashlists[hash], list) {
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if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) {
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devmap = tmp;
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break;
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}
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}
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spin_unlock(&dasd_devmap_lock);
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return devmap;
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}
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/*
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* Check if busid has been added to the list of dasd ranges.
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*/
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int
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dasd_busid_known(const char *bus_id)
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{
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return IS_ERR(dasd_find_busid(bus_id)) ? -ENOENT : 0;
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}
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/*
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* Forget all about the device numbers added so far.
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* This may only be called at module unload or system shutdown.
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*/
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static void
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dasd_forget_ranges(void)
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{
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struct dasd_devmap *devmap, *n;
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int i;
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spin_lock(&dasd_devmap_lock);
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for (i = 0; i < 256; i++) {
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list_for_each_entry_safe(devmap, n, &dasd_hashlists[i], list) {
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BUG_ON(devmap->device != NULL);
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list_del(&devmap->list);
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kfree(devmap);
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}
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}
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spin_unlock(&dasd_devmap_lock);
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}
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/*
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* Find the device struct by its device index.
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*/
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struct dasd_device *
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dasd_device_from_devindex(int devindex)
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{
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|
struct dasd_devmap *devmap, *tmp;
|
|
struct dasd_device *device;
|
|
int i;
|
|
|
|
spin_lock(&dasd_devmap_lock);
|
|
devmap = NULL;
|
|
for (i = 0; (i < 256) && !devmap; i++)
|
|
list_for_each_entry(tmp, &dasd_hashlists[i], list)
|
|
if (tmp->devindex == devindex) {
|
|
/* Found the devmap for the device. */
|
|
devmap = tmp;
|
|
break;
|
|
}
|
|
if (devmap && devmap->device) {
|
|
device = devmap->device;
|
|
dasd_get_device(device);
|
|
} else
|
|
device = ERR_PTR(-ENODEV);
|
|
spin_unlock(&dasd_devmap_lock);
|
|
return device;
|
|
}
|
|
|
|
/*
|
|
* Return devmap for cdev. If no devmap exists yet, create one and
|
|
* connect it to the cdev.
|
|
*/
|
|
static struct dasd_devmap *
|
|
dasd_devmap_from_cdev(struct ccw_device *cdev)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
|
|
devmap = dasd_find_busid(dev_name(&cdev->dev));
|
|
if (IS_ERR(devmap))
|
|
devmap = dasd_add_busid(dev_name(&cdev->dev),
|
|
DASD_FEATURE_DEFAULT);
|
|
return devmap;
|
|
}
|
|
|
|
/*
|
|
* Create a dasd device structure for cdev.
|
|
*/
|
|
struct dasd_device *
|
|
dasd_create_device(struct ccw_device *cdev)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
struct dasd_device *device;
|
|
unsigned long flags;
|
|
int rc;
|
|
|
|
devmap = dasd_devmap_from_cdev(cdev);
|
|
if (IS_ERR(devmap))
|
|
return (void *) devmap;
|
|
|
|
device = dasd_alloc_device();
|
|
if (IS_ERR(device))
|
|
return device;
|
|
atomic_set(&device->ref_count, 3);
|
|
|
|
spin_lock(&dasd_devmap_lock);
|
|
if (!devmap->device) {
|
|
devmap->device = device;
|
|
device->devindex = devmap->devindex;
|
|
device->features = devmap->features;
|
|
get_device(&cdev->dev);
|
|
device->cdev = cdev;
|
|
rc = 0;
|
|
} else
|
|
/* Someone else was faster. */
|
|
rc = -EBUSY;
|
|
spin_unlock(&dasd_devmap_lock);
|
|
|
|
if (rc) {
|
|
dasd_free_device(device);
|
|
return ERR_PTR(rc);
|
|
}
|
|
|
|
spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
|
|
dev_set_drvdata(&cdev->dev, device);
|
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
|
|
|
|
return device;
|
|
}
|
|
|
|
/*
|
|
* Wait queue for dasd_delete_device waits.
|
|
*/
|
|
static DECLARE_WAIT_QUEUE_HEAD(dasd_delete_wq);
|
|
|
|
/*
|
|
* Remove a dasd device structure. The passed referenced
|
|
* is destroyed.
|
|
*/
|
|
void
|
|
dasd_delete_device(struct dasd_device *device)
|
|
{
|
|
struct ccw_device *cdev;
|
|
struct dasd_devmap *devmap;
|
|
unsigned long flags;
|
|
|
|
/* First remove device pointer from devmap. */
|
|
devmap = dasd_find_busid(dev_name(&device->cdev->dev));
|
|
BUG_ON(IS_ERR(devmap));
|
|
spin_lock(&dasd_devmap_lock);
|
|
if (devmap->device != device) {
|
|
spin_unlock(&dasd_devmap_lock);
|
|
dasd_put_device(device);
|
|
return;
|
|
}
|
|
devmap->device = NULL;
|
|
spin_unlock(&dasd_devmap_lock);
|
|
|
|
/* Disconnect dasd_device structure from ccw_device structure. */
|
|
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
|
|
dev_set_drvdata(&device->cdev->dev, NULL);
|
|
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
|
|
|
|
/*
|
|
* Drop ref_count by 3, one for the devmap reference, one for
|
|
* the cdev reference and one for the passed reference.
|
|
*/
|
|
atomic_sub(3, &device->ref_count);
|
|
|
|
/* Wait for reference counter to drop to zero. */
|
|
wait_event(dasd_delete_wq, atomic_read(&device->ref_count) == 0);
|
|
|
|
/* Disconnect dasd_device structure from ccw_device structure. */
|
|
cdev = device->cdev;
|
|
device->cdev = NULL;
|
|
|
|
/* Put ccw_device structure. */
|
|
put_device(&cdev->dev);
|
|
|
|
/* Now the device structure can be freed. */
|
|
dasd_free_device(device);
|
|
}
|
|
|
|
/*
|
|
* Reference counter dropped to zero. Wake up waiter
|
|
* in dasd_delete_device.
|
|
*/
|
|
void
|
|
dasd_put_device_wake(struct dasd_device *device)
|
|
{
|
|
wake_up(&dasd_delete_wq);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dasd_put_device_wake);
|
|
|
|
/*
|
|
* Return dasd_device structure associated with cdev.
|
|
* This function needs to be called with the ccw device
|
|
* lock held. It can be used from interrupt context.
|
|
*/
|
|
struct dasd_device *
|
|
dasd_device_from_cdev_locked(struct ccw_device *cdev)
|
|
{
|
|
struct dasd_device *device = dev_get_drvdata(&cdev->dev);
|
|
|
|
if (!device)
|
|
return ERR_PTR(-ENODEV);
|
|
dasd_get_device(device);
|
|
return device;
|
|
}
|
|
|
|
/*
|
|
* Return dasd_device structure associated with cdev.
|
|
*/
|
|
struct dasd_device *
|
|
dasd_device_from_cdev(struct ccw_device *cdev)
|
|
{
|
|
struct dasd_device *device;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
|
|
device = dasd_device_from_cdev_locked(cdev);
|
|
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
|
|
return device;
|
|
}
|
|
|
|
void dasd_add_link_to_gendisk(struct gendisk *gdp, struct dasd_device *device)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
|
|
devmap = dasd_find_busid(dev_name(&device->cdev->dev));
|
|
if (IS_ERR(devmap))
|
|
return;
|
|
spin_lock(&dasd_devmap_lock);
|
|
gdp->private_data = devmap;
|
|
spin_unlock(&dasd_devmap_lock);
|
|
}
|
|
|
|
struct dasd_device *dasd_device_from_gendisk(struct gendisk *gdp)
|
|
{
|
|
struct dasd_device *device;
|
|
struct dasd_devmap *devmap;
|
|
|
|
if (!gdp->private_data)
|
|
return NULL;
|
|
device = NULL;
|
|
spin_lock(&dasd_devmap_lock);
|
|
devmap = gdp->private_data;
|
|
if (devmap && devmap->device) {
|
|
device = devmap->device;
|
|
dasd_get_device(device);
|
|
}
|
|
spin_unlock(&dasd_devmap_lock);
|
|
return device;
|
|
}
|
|
|
|
/*
|
|
* SECTION: files in sysfs
|
|
*/
|
|
|
|
/*
|
|
* failfast controls the behaviour, if no path is available
|
|
*/
|
|
static ssize_t dasd_ff_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
int ff_flag;
|
|
|
|
devmap = dasd_find_busid(dev_name(dev));
|
|
if (!IS_ERR(devmap))
|
|
ff_flag = (devmap->features & DASD_FEATURE_FAILFAST) != 0;
|
|
else
|
|
ff_flag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_FAILFAST) != 0;
|
|
return snprintf(buf, PAGE_SIZE, ff_flag ? "1\n" : "0\n");
|
|
}
|
|
|
|
static ssize_t dasd_ff_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
int val;
|
|
char *endp;
|
|
|
|
devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(devmap))
|
|
return PTR_ERR(devmap);
|
|
|
|
val = simple_strtoul(buf, &endp, 0);
|
|
if (((endp + 1) < (buf + count)) || (val > 1))
|
|
return -EINVAL;
|
|
|
|
spin_lock(&dasd_devmap_lock);
|
|
if (val)
|
|
devmap->features |= DASD_FEATURE_FAILFAST;
|
|
else
|
|
devmap->features &= ~DASD_FEATURE_FAILFAST;
|
|
if (devmap->device)
|
|
devmap->device->features = devmap->features;
|
|
spin_unlock(&dasd_devmap_lock);
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(failfast, 0644, dasd_ff_show, dasd_ff_store);
|
|
|
|
/*
|
|
* readonly controls the readonly status of a dasd
|
|
*/
|
|
static ssize_t
|
|
dasd_ro_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
int ro_flag;
|
|
|
|
devmap = dasd_find_busid(dev_name(dev));
|
|
if (!IS_ERR(devmap))
|
|
ro_flag = (devmap->features & DASD_FEATURE_READONLY) != 0;
|
|
else
|
|
ro_flag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_READONLY) != 0;
|
|
return snprintf(buf, PAGE_SIZE, ro_flag ? "1\n" : "0\n");
|
|
}
|
|
|
|
static ssize_t
|
|
dasd_ro_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
struct dasd_device *device;
|
|
int val;
|
|
char *endp;
|
|
|
|
devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(devmap))
|
|
return PTR_ERR(devmap);
|
|
|
|
val = simple_strtoul(buf, &endp, 0);
|
|
if (((endp + 1) < (buf + count)) || (val > 1))
|
|
return -EINVAL;
|
|
|
|
spin_lock(&dasd_devmap_lock);
|
|
if (val)
|
|
devmap->features |= DASD_FEATURE_READONLY;
|
|
else
|
|
devmap->features &= ~DASD_FEATURE_READONLY;
|
|
device = devmap->device;
|
|
if (device) {
|
|
device->features = devmap->features;
|
|
val = val || test_bit(DASD_FLAG_DEVICE_RO, &device->flags);
|
|
}
|
|
spin_unlock(&dasd_devmap_lock);
|
|
if (device && device->block && device->block->gdp)
|
|
set_disk_ro(device->block->gdp, val);
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(readonly, 0644, dasd_ro_show, dasd_ro_store);
|
|
/*
|
|
* erplog controls the logging of ERP related data
|
|
* (e.g. failing channel programs).
|
|
*/
|
|
static ssize_t
|
|
dasd_erplog_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
int erplog;
|
|
|
|
devmap = dasd_find_busid(dev_name(dev));
|
|
if (!IS_ERR(devmap))
|
|
erplog = (devmap->features & DASD_FEATURE_ERPLOG) != 0;
|
|
else
|
|
erplog = (DASD_FEATURE_DEFAULT & DASD_FEATURE_ERPLOG) != 0;
|
|
return snprintf(buf, PAGE_SIZE, erplog ? "1\n" : "0\n");
|
|
}
|
|
|
|
static ssize_t
|
|
dasd_erplog_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
int val;
|
|
char *endp;
|
|
|
|
devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(devmap))
|
|
return PTR_ERR(devmap);
|
|
|
|
val = simple_strtoul(buf, &endp, 0);
|
|
if (((endp + 1) < (buf + count)) || (val > 1))
|
|
return -EINVAL;
|
|
|
|
spin_lock(&dasd_devmap_lock);
|
|
if (val)
|
|
devmap->features |= DASD_FEATURE_ERPLOG;
|
|
else
|
|
devmap->features &= ~DASD_FEATURE_ERPLOG;
|
|
if (devmap->device)
|
|
devmap->device->features = devmap->features;
|
|
spin_unlock(&dasd_devmap_lock);
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(erplog, 0644, dasd_erplog_show, dasd_erplog_store);
|
|
|
|
/*
|
|
* use_diag controls whether the driver should use diag rather than ssch
|
|
* to talk to the device
|
|
*/
|
|
static ssize_t
|
|
dasd_use_diag_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
int use_diag;
|
|
|
|
devmap = dasd_find_busid(dev_name(dev));
|
|
if (!IS_ERR(devmap))
|
|
use_diag = (devmap->features & DASD_FEATURE_USEDIAG) != 0;
|
|
else
|
|
use_diag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USEDIAG) != 0;
|
|
return sprintf(buf, use_diag ? "1\n" : "0\n");
|
|
}
|
|
|
|
static ssize_t
|
|
dasd_use_diag_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
ssize_t rc;
|
|
int val;
|
|
char *endp;
|
|
|
|
devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(devmap))
|
|
return PTR_ERR(devmap);
|
|
|
|
val = simple_strtoul(buf, &endp, 0);
|
|
if (((endp + 1) < (buf + count)) || (val > 1))
|
|
return -EINVAL;
|
|
|
|
spin_lock(&dasd_devmap_lock);
|
|
/* Changing diag discipline flag is only allowed in offline state. */
|
|
rc = count;
|
|
if (!devmap->device && !(devmap->features & DASD_FEATURE_USERAW)) {
|
|
if (val)
|
|
devmap->features |= DASD_FEATURE_USEDIAG;
|
|
else
|
|
devmap->features &= ~DASD_FEATURE_USEDIAG;
|
|
} else
|
|
rc = -EPERM;
|
|
spin_unlock(&dasd_devmap_lock);
|
|
return rc;
|
|
}
|
|
|
|
static DEVICE_ATTR(use_diag, 0644, dasd_use_diag_show, dasd_use_diag_store);
|
|
|
|
/*
|
|
* use_raw controls whether the driver should give access to raw eckd data or
|
|
* operate in standard mode
|
|
*/
|
|
static ssize_t
|
|
dasd_use_raw_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
int use_raw;
|
|
|
|
devmap = dasd_find_busid(dev_name(dev));
|
|
if (!IS_ERR(devmap))
|
|
use_raw = (devmap->features & DASD_FEATURE_USERAW) != 0;
|
|
else
|
|
use_raw = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USERAW) != 0;
|
|
return sprintf(buf, use_raw ? "1\n" : "0\n");
|
|
}
|
|
|
|
static ssize_t
|
|
dasd_use_raw_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
ssize_t rc;
|
|
unsigned long val;
|
|
|
|
devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(devmap))
|
|
return PTR_ERR(devmap);
|
|
|
|
if ((strict_strtoul(buf, 10, &val) != 0) || val > 1)
|
|
return -EINVAL;
|
|
|
|
spin_lock(&dasd_devmap_lock);
|
|
/* Changing diag discipline flag is only allowed in offline state. */
|
|
rc = count;
|
|
if (!devmap->device && !(devmap->features & DASD_FEATURE_USEDIAG)) {
|
|
if (val)
|
|
devmap->features |= DASD_FEATURE_USERAW;
|
|
else
|
|
devmap->features &= ~DASD_FEATURE_USERAW;
|
|
} else
|
|
rc = -EPERM;
|
|
spin_unlock(&dasd_devmap_lock);
|
|
return rc;
|
|
}
|
|
|
|
static DEVICE_ATTR(raw_track_access, 0644, dasd_use_raw_show,
|
|
dasd_use_raw_store);
|
|
|
|
static ssize_t
|
|
dasd_discipline_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct dasd_device *device;
|
|
ssize_t len;
|
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(device))
|
|
goto out;
|
|
else if (!device->discipline) {
|
|
dasd_put_device(device);
|
|
goto out;
|
|
} else {
|
|
len = snprintf(buf, PAGE_SIZE, "%s\n",
|
|
device->discipline->name);
|
|
dasd_put_device(device);
|
|
return len;
|
|
}
|
|
out:
|
|
len = snprintf(buf, PAGE_SIZE, "none\n");
|
|
return len;
|
|
}
|
|
|
|
static DEVICE_ATTR(discipline, 0444, dasd_discipline_show, NULL);
|
|
|
|
static ssize_t
|
|
dasd_device_status_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct dasd_device *device;
|
|
ssize_t len;
|
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev));
|
|
if (!IS_ERR(device)) {
|
|
switch (device->state) {
|
|
case DASD_STATE_NEW:
|
|
len = snprintf(buf, PAGE_SIZE, "new\n");
|
|
break;
|
|
case DASD_STATE_KNOWN:
|
|
len = snprintf(buf, PAGE_SIZE, "detected\n");
|
|
break;
|
|
case DASD_STATE_BASIC:
|
|
len = snprintf(buf, PAGE_SIZE, "basic\n");
|
|
break;
|
|
case DASD_STATE_UNFMT:
|
|
len = snprintf(buf, PAGE_SIZE, "unformatted\n");
|
|
break;
|
|
case DASD_STATE_READY:
|
|
len = snprintf(buf, PAGE_SIZE, "ready\n");
|
|
break;
|
|
case DASD_STATE_ONLINE:
|
|
len = snprintf(buf, PAGE_SIZE, "online\n");
|
|
break;
|
|
default:
|
|
len = snprintf(buf, PAGE_SIZE, "no stat\n");
|
|
break;
|
|
}
|
|
dasd_put_device(device);
|
|
} else
|
|
len = snprintf(buf, PAGE_SIZE, "unknown\n");
|
|
return len;
|
|
}
|
|
|
|
static DEVICE_ATTR(status, 0444, dasd_device_status_show, NULL);
|
|
|
|
static ssize_t dasd_alias_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dasd_device *device;
|
|
struct dasd_uid uid;
|
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(device))
|
|
return sprintf(buf, "0\n");
|
|
|
|
if (device->discipline && device->discipline->get_uid &&
|
|
!device->discipline->get_uid(device, &uid)) {
|
|
if (uid.type == UA_BASE_PAV_ALIAS ||
|
|
uid.type == UA_HYPER_PAV_ALIAS) {
|
|
dasd_put_device(device);
|
|
return sprintf(buf, "1\n");
|
|
}
|
|
}
|
|
dasd_put_device(device);
|
|
|
|
return sprintf(buf, "0\n");
|
|
}
|
|
|
|
static DEVICE_ATTR(alias, 0444, dasd_alias_show, NULL);
|
|
|
|
static ssize_t dasd_vendor_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dasd_device *device;
|
|
struct dasd_uid uid;
|
|
char *vendor;
|
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev));
|
|
vendor = "";
|
|
if (IS_ERR(device))
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", vendor);
|
|
|
|
if (device->discipline && device->discipline->get_uid &&
|
|
!device->discipline->get_uid(device, &uid))
|
|
vendor = uid.vendor;
|
|
|
|
dasd_put_device(device);
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", vendor);
|
|
}
|
|
|
|
static DEVICE_ATTR(vendor, 0444, dasd_vendor_show, NULL);
|
|
|
|
#define UID_STRLEN ( /* vendor */ 3 + 1 + /* serial */ 14 + 1 +\
|
|
/* SSID */ 4 + 1 + /* unit addr */ 2 + 1 +\
|
|
/* vduit */ 32 + 1)
|
|
|
|
static ssize_t
|
|
dasd_uid_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dasd_device *device;
|
|
struct dasd_uid uid;
|
|
char uid_string[UID_STRLEN];
|
|
char ua_string[3];
|
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev));
|
|
uid_string[0] = 0;
|
|
if (IS_ERR(device))
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", uid_string);
|
|
|
|
if (device->discipline && device->discipline->get_uid &&
|
|
!device->discipline->get_uid(device, &uid)) {
|
|
switch (uid.type) {
|
|
case UA_BASE_DEVICE:
|
|
snprintf(ua_string, sizeof(ua_string), "%02x",
|
|
uid.real_unit_addr);
|
|
break;
|
|
case UA_BASE_PAV_ALIAS:
|
|
snprintf(ua_string, sizeof(ua_string), "%02x",
|
|
uid.base_unit_addr);
|
|
break;
|
|
case UA_HYPER_PAV_ALIAS:
|
|
snprintf(ua_string, sizeof(ua_string), "xx");
|
|
break;
|
|
default:
|
|
/* should not happen, treat like base device */
|
|
snprintf(ua_string, sizeof(ua_string), "%02x",
|
|
uid.real_unit_addr);
|
|
break;
|
|
}
|
|
|
|
if (strlen(uid.vduit) > 0)
|
|
snprintf(uid_string, sizeof(uid_string),
|
|
"%s.%s.%04x.%s.%s",
|
|
uid.vendor, uid.serial, uid.ssid, ua_string,
|
|
uid.vduit);
|
|
else
|
|
snprintf(uid_string, sizeof(uid_string),
|
|
"%s.%s.%04x.%s",
|
|
uid.vendor, uid.serial, uid.ssid, ua_string);
|
|
}
|
|
dasd_put_device(device);
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", uid_string);
|
|
}
|
|
static DEVICE_ATTR(uid, 0444, dasd_uid_show, NULL);
|
|
|
|
/*
|
|
* extended error-reporting
|
|
*/
|
|
static ssize_t
|
|
dasd_eer_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
int eer_flag;
|
|
|
|
devmap = dasd_find_busid(dev_name(dev));
|
|
if (!IS_ERR(devmap) && devmap->device)
|
|
eer_flag = dasd_eer_enabled(devmap->device);
|
|
else
|
|
eer_flag = 0;
|
|
return snprintf(buf, PAGE_SIZE, eer_flag ? "1\n" : "0\n");
|
|
}
|
|
|
|
static ssize_t
|
|
dasd_eer_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
int val, rc;
|
|
char *endp;
|
|
|
|
devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(devmap))
|
|
return PTR_ERR(devmap);
|
|
if (!devmap->device)
|
|
return -ENODEV;
|
|
|
|
val = simple_strtoul(buf, &endp, 0);
|
|
if (((endp + 1) < (buf + count)) || (val > 1))
|
|
return -EINVAL;
|
|
|
|
if (val) {
|
|
rc = dasd_eer_enable(devmap->device);
|
|
if (rc)
|
|
return rc;
|
|
} else
|
|
dasd_eer_disable(devmap->device);
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(eer_enabled, 0644, dasd_eer_show, dasd_eer_store);
|
|
|
|
/*
|
|
* expiration time for default requests
|
|
*/
|
|
static ssize_t
|
|
dasd_expires_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct dasd_device *device;
|
|
int len;
|
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(device))
|
|
return -ENODEV;
|
|
len = snprintf(buf, PAGE_SIZE, "%lu\n", device->default_expires);
|
|
dasd_put_device(device);
|
|
return len;
|
|
}
|
|
|
|
static ssize_t
|
|
dasd_expires_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct dasd_device *device;
|
|
unsigned long val;
|
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(device))
|
|
return -ENODEV;
|
|
|
|
if ((strict_strtoul(buf, 10, &val) != 0) ||
|
|
(val > DASD_EXPIRES_MAX) || val == 0) {
|
|
dasd_put_device(device);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (val)
|
|
device->default_expires = val;
|
|
|
|
dasd_put_device(device);
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(expires, 0644, dasd_expires_show, dasd_expires_store);
|
|
|
|
static ssize_t dasd_reservation_policy_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
int rc = 0;
|
|
|
|
devmap = dasd_find_busid(dev_name(dev));
|
|
if (IS_ERR(devmap)) {
|
|
rc = snprintf(buf, PAGE_SIZE, "ignore\n");
|
|
} else {
|
|
spin_lock(&dasd_devmap_lock);
|
|
if (devmap->features & DASD_FEATURE_FAILONSLCK)
|
|
rc = snprintf(buf, PAGE_SIZE, "fail\n");
|
|
else
|
|
rc = snprintf(buf, PAGE_SIZE, "ignore\n");
|
|
spin_unlock(&dasd_devmap_lock);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static ssize_t dasd_reservation_policy_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
int rc;
|
|
|
|
devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(devmap))
|
|
return PTR_ERR(devmap);
|
|
rc = 0;
|
|
spin_lock(&dasd_devmap_lock);
|
|
if (sysfs_streq("ignore", buf))
|
|
devmap->features &= ~DASD_FEATURE_FAILONSLCK;
|
|
else if (sysfs_streq("fail", buf))
|
|
devmap->features |= DASD_FEATURE_FAILONSLCK;
|
|
else
|
|
rc = -EINVAL;
|
|
if (devmap->device)
|
|
devmap->device->features = devmap->features;
|
|
spin_unlock(&dasd_devmap_lock);
|
|
if (rc)
|
|
return rc;
|
|
else
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(reservation_policy, 0644,
|
|
dasd_reservation_policy_show, dasd_reservation_policy_store);
|
|
|
|
static ssize_t dasd_reservation_state_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct dasd_device *device;
|
|
int rc = 0;
|
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(device))
|
|
return snprintf(buf, PAGE_SIZE, "none\n");
|
|
|
|
if (test_bit(DASD_FLAG_IS_RESERVED, &device->flags))
|
|
rc = snprintf(buf, PAGE_SIZE, "reserved\n");
|
|
else if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags))
|
|
rc = snprintf(buf, PAGE_SIZE, "lost\n");
|
|
else
|
|
rc = snprintf(buf, PAGE_SIZE, "none\n");
|
|
dasd_put_device(device);
|
|
return rc;
|
|
}
|
|
|
|
static ssize_t dasd_reservation_state_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct dasd_device *device;
|
|
int rc = 0;
|
|
|
|
device = dasd_device_from_cdev(to_ccwdev(dev));
|
|
if (IS_ERR(device))
|
|
return -ENODEV;
|
|
if (sysfs_streq("reset", buf))
|
|
clear_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
|
|
else
|
|
rc = -EINVAL;
|
|
dasd_put_device(device);
|
|
|
|
if (rc)
|
|
return rc;
|
|
else
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(last_known_reservation_state, 0644,
|
|
dasd_reservation_state_show, dasd_reservation_state_store);
|
|
|
|
static struct attribute * dasd_attrs[] = {
|
|
&dev_attr_readonly.attr,
|
|
&dev_attr_discipline.attr,
|
|
&dev_attr_status.attr,
|
|
&dev_attr_alias.attr,
|
|
&dev_attr_vendor.attr,
|
|
&dev_attr_uid.attr,
|
|
&dev_attr_use_diag.attr,
|
|
&dev_attr_raw_track_access.attr,
|
|
&dev_attr_eer_enabled.attr,
|
|
&dev_attr_erplog.attr,
|
|
&dev_attr_failfast.attr,
|
|
&dev_attr_expires.attr,
|
|
&dev_attr_reservation_policy.attr,
|
|
&dev_attr_last_known_reservation_state.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group dasd_attr_group = {
|
|
.attrs = dasd_attrs,
|
|
};
|
|
|
|
/*
|
|
* Return value of the specified feature.
|
|
*/
|
|
int
|
|
dasd_get_feature(struct ccw_device *cdev, int feature)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
|
|
devmap = dasd_find_busid(dev_name(&cdev->dev));
|
|
if (IS_ERR(devmap))
|
|
return PTR_ERR(devmap);
|
|
|
|
return ((devmap->features & feature) != 0);
|
|
}
|
|
|
|
/*
|
|
* Set / reset given feature.
|
|
* Flag indicates wether to set (!=0) or the reset (=0) the feature.
|
|
*/
|
|
int
|
|
dasd_set_feature(struct ccw_device *cdev, int feature, int flag)
|
|
{
|
|
struct dasd_devmap *devmap;
|
|
|
|
devmap = dasd_find_busid(dev_name(&cdev->dev));
|
|
if (IS_ERR(devmap))
|
|
return PTR_ERR(devmap);
|
|
|
|
spin_lock(&dasd_devmap_lock);
|
|
if (flag)
|
|
devmap->features |= feature;
|
|
else
|
|
devmap->features &= ~feature;
|
|
if (devmap->device)
|
|
devmap->device->features = devmap->features;
|
|
spin_unlock(&dasd_devmap_lock);
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
dasd_add_sysfs_files(struct ccw_device *cdev)
|
|
{
|
|
return sysfs_create_group(&cdev->dev.kobj, &dasd_attr_group);
|
|
}
|
|
|
|
void
|
|
dasd_remove_sysfs_files(struct ccw_device *cdev)
|
|
{
|
|
sysfs_remove_group(&cdev->dev.kobj, &dasd_attr_group);
|
|
}
|
|
|
|
|
|
int
|
|
dasd_devmap_init(void)
|
|
{
|
|
int i;
|
|
|
|
/* Initialize devmap structures. */
|
|
dasd_max_devindex = 0;
|
|
for (i = 0; i < 256; i++)
|
|
INIT_LIST_HEAD(&dasd_hashlists[i]);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
dasd_devmap_exit(void)
|
|
{
|
|
dasd_forget_ranges();
|
|
}
|